Java String to Date toDate(Object v, String format, Date defaultValue)

Description

to Date

License

Open Source License

Declaration

public static Date toDate(Object v, String format, Date defaultValue) 

Method Source Code

//package com.java2s;
/*******************************************************************************************
 *   Copyright (c) 2016, zzg.zhou(11039850@qq.com)
 * /*ww  w.j a  v a 2s . c  o  m*/
 *  Monalisa is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.

 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.

 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************************/

import java.text.ParseException;
import java.text.SimpleDateFormat;

import java.util.Date;

public class Main {
    public static Date toDate(Object v, String format, Date defaultValue) {
        if (v == null) {
            return defaultValue;
        } else {
            if (v instanceof Date) {
                return (Date) v;
            } else if (v.getClass() == Long.class
                    || v.getClass() == long.class) {
                return new Date((Long) v);
            } else {
                String x = "" + v;

                try {
                    if (format != null && format.length() > 0) {
                        SimpleDateFormat sdf = new SimpleDateFormat(format);
                        return sdf.parse(x);
                    } else {
                        int m = x.indexOf(":");
                        if (m > 0) {
                            if (x.indexOf(":", m + 1) > 0) {
                                SimpleDateFormat sdf = new SimpleDateFormat(
                                        "yyyy-MM-dd HH:mm:ss");
                                return sdf.parse(x);
                            } else {
                                SimpleDateFormat sdf = new SimpleDateFormat(
                                        "yyyy-MM-dd HH:mm");
                                return sdf.parse(x);
                            }
                        } else {
                            if (x.indexOf(" ") > 0) {
                                SimpleDateFormat sdf = new SimpleDateFormat(
                                        "yyyy-MM-dd HH");
                                return sdf.parse(x);
                            } else {
                                SimpleDateFormat sdf = new SimpleDateFormat(
                                        "yyyy-MM-dd");
                                return sdf.parse(x);
                            }
                        }
                    }
                } catch (ParseException e) {
                    throw new RuntimeException("Invalid date: " + x, e);
                }
            }
        }
    }
}

Related

1. toDate(final String dateString, final String format)
2. toDate(final String dateString, final String pattern)
3. toDate(int date, String timeFormat)
4. toDate(long value, String format)
5. toDate(Map filter, String field)
6. toDate(Object value, String format)
7. toDate(String createdAt)
8. toDate(String d)
9. toDate(String date)